Which three statements are true about the structure of a Java class?

A class can define multiple private constructors, provided each constructor has a unique parameter signature to allow for constructor overloading.

In Java, it is permissible for a method and a field within the same class to share the same name, although this practice is generally discouraged for clarity.

Static methods, like instance methods, can be overloaded in a Java class, provided they have distinct parameter lists, allowing multiple methods with the same name but different signatures.

A public class is not required to have a `main` method; the `main` method is only necessary if the class is intended to be the entry point for a standalone Java application.

Methods are not mandatory components of a class; a class can consist solely of fields or even be entirely empty and still be syntactically valid in Java.

Class fields (instance variables and static variables) in Java are automatically initialized to default values (e.g., 0 for integers, null for objects) if not explicitly initialized by the programmer, so they do not strictly require explicit initialization before use.